Severity: Fix right away. Driving risks expensive damage or a breakdown.
The computer found a fault in the circuit for the ignition coil on cylinder 4, so that cylinder may not be getting a spark.
Swap the coil with another cylinder to see if the problem moves, then replace the faulty coil or repair the wiring.
A dead coil means a misfire, which can overheat the catalytic converter. Get it fixed soon.
Avoid driving until it is checked — towing is the safer choice. A dead coil means a misfire, which can overheat the catalytic converter. Get it fixed soon.
The most common causes are: Failed ignition coil on cylinder 4; Damaged coil wiring or connector; Shorted coil circuit; Failing engine computer driver. A scan tool and a visual check of the parts above is where a technician starts.
Swap the coil with another cylinder to see if the problem moves, then replace the faulty coil or repair the wiring.
